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by Apretext
Sat Jul 06, 2019 8:42 am
Forum: General discussion
Topic: Is there any way to run two different resolutions, one for VNC, one for screen?
Replies: 0
Views: 78

Is there any way to run two different resolutions, one for VNC, one for screen?

I have a (currently pi 3B+ although I also now have a 4, which will be replacing the 3B+ as soon as I can update the os) raspberry pi connected to a 7” touchscreen, which is great for using the pi, but not so great for programming it, which I tend to do via vnc on my main computer. Is there any way ...
by Apretext
Mon Apr 29, 2019 3:16 pm
Forum: Camera board
Topic: video recording very "jumpy".
Replies: 4
Views: 306

Re: video recording very "jumpy".

Yep, official camera V2 on 3B+
by Apretext
Mon Apr 29, 2019 2:02 pm
Forum: Camera board
Topic: video recording very "jumpy".
Replies: 4
Views: 306

video recording very "jumpy".

I'm sure there is a more technical name for this issue, but essentially, I've got a pi and camera mounted on a tripod, which rotates. The rotation part works really smoothly, but even the most basic of resolutions are far from smooth. I'm currently using nanpy to drive the stepper motor (it's curren...
by Apretext
Thu Apr 04, 2019 10:19 am
Forum: Troubleshooting
Topic: I suspect My Pi is bricked, due to a failed PSU, but how do I check?
Replies: 25
Views: 979

Re: I suspect My Pi is bricked, due to a failed PSU, but how do I check?

Ok, so I've found D7, and it is indeed shorted. So, Time to remove it and see if it'll work again (before I then order a new diode....)
by Apretext
Wed Apr 03, 2019 9:04 pm
Forum: Troubleshooting
Topic: I suspect My Pi is bricked, due to a failed PSU, but how do I check?
Replies: 25
Views: 979

Re: I suspect My Pi is bricked, due to a failed PSU, but how do I check?

Imperf3kt wrote:
Wed Apr 03, 2019 8:40 pm
This is one of the reasons I prefer to step up the voltage, rather than down.
Worst case scenario, you corrupt the SD card and have to reflash.

Is using a lower voltage supply an option?
Sadly no, I need 12V for some stepper motors.
by Apretext
Wed Apr 03, 2019 5:16 pm
Forum: Troubleshooting
Topic: I suspect My Pi is bricked, due to a failed PSU, but how do I check?
Replies: 25
Views: 979

Re: I suspect My Pi is bricked, due to a failed PSU, but how do I check?

While redesigning your PSU, you should add a polyfuse (same type as D7) to the output if you need to power the Pi through the GPIO header. Is there a reason for trying to use a linear regulator? 12V in, 5V out gives about 33% efficiency -- wasting twice as much power as the Pi uses (that's when it ...
by Apretext
Wed Apr 03, 2019 12:47 pm
Forum: Troubleshooting
Topic: I suspect My Pi is bricked, due to a failed PSU, but how do I check?
Replies: 25
Views: 979

Re: I suspect My Pi is bricked, due to a failed PSU, but how do I check?

RaTTuS wrote:
Wed Apr 03, 2019 12:35 pm
put it down as a bad choice in powering ....
much easier to start a gin wiht a new board TBH
New board arrives tomorrow. Would just like to have old board as backup.

And currently redesigning the PSU part.....
by Apretext
Wed Apr 03, 2019 12:01 pm
Forum: Troubleshooting
Topic: I suspect My Pi is bricked, due to a failed PSU, but how do I check?
Replies: 25
Views: 979

Re: I suspect My Pi is bricked, due to a failed PSU, but how do I check?

Sadly it wasn't the 7805 that failed, it was the transistor next to it. No idea if that resulted in a voltage of above 5v (it would be 12v if it was), or a short across the pins.

Which one of the myriad of SMD components may be the (now) faulty diode?
by Apretext
Wed Apr 03, 2019 10:45 am
Forum: Troubleshooting
Topic: I suspect My Pi is bricked, due to a failed PSU, but how do I check?
Replies: 25
Views: 979

I suspect My Pi is bricked, due to a failed PSU, but how do I check?

So, as above really. I have a 3B+ as part of a project, which is tricky to get power to via micro USB, so I had a 5V regulator set up using a standard circuit which was detailed in the 7805 technical documentation. It all worked fine and lovely, until, suddenly whilst installing Numpy it failed. It ...

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